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Question

If speed of a motor car becomes six times, then the kinetic energy becomes

A
6times
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B
36times
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C
12times
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D
none of these
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Solution

The correct option is C 36times
The kinetic energy of the boat is given by:
KE=12mv2

Now when the speed becomes six times the initial speed:
KE=12m(6v)2

KE=36×12mv2

KE=36×KE

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